Bin Yang† , Dan Wang, Qin-Ting Chen, Jin Chen, Kang Chen, Ji-Bin Miao, Jia-Sheng Qian, Ru Xia, and You Shi*
College of Chemistry & Chemical Engineering, Institute
of High Performance Rubber Materials & Products, and Key Laboratory of
Environment-Friendly Polymeric Materials of Anhui Province, Anhui University,
Hefei 230601, China
*College of
Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
In this study, we prepared
series of recycled polyethylene terephthalate (RPET)/polyethylene (PE) blends
using melt extrusion. The effect of RPET content on crystallization behavior
and thermal conductive properties of the resultant blends were investigated
using differential scanning calorimetry (DSC), dynamic mechanical thermal
analysis (DMTA), etc. RPET was found to exert nucleating effect on the melt
crystallization of PE. The Agari model presented fairly reasonable
prediction of thermal conductivity as a function of RPET loading. The melt
cooling process was predicted with an enthalpy transformation method (ETM),
which is a well-established mean of evaluating the instantaneous heat
conduction of crystalline polymers/composites, and the obtained curves were
consistent with our experimental results. Besides, a four-parameter model (FPM)
was adopted coupled with an in-situ temperature measurement in order to
further disclose the solidification and crystallization kinetics of PE in the
presence of RPET in the blends.
Keywords: melt blending, thermal properties, cooling behavior, recycled polyethylene terephthalate, polyethylene
2020; 44(3): 270-280
Published online May 25, 2020
College of Chemistry & Chemical Engineering, Institute of High Performance Rubber Materials & Products, and Key Laboratory of Environment-Friendly Polymeric Materials of Anhui Province, Anhui University, Hefei 230601, China